I havent installed mod_perl on my comp yet but in many of the forums i go to installing it seems to be a major problem and i thought it would be appropriate for this question to be asked in a still new board(also might be good to add to FAQ).

mod_perl itself can be installed through ppm/cpan, if you can find which mirror has the files. After that, you just need to add a few lines to httpd.conf to have Apache load it and tell it which files (either all Perl scripts or just a certain directory) to run under mod_perl, then restart Apache. That's how I did it anyway... --Philip FuzzyLogic at PerlMad dot com

EVERYTHING=1 will enable all the mod_perl hooks. This includes all the advanced features of mod_perl such as authentication and authorization control, configuration of the server with Perl, output filtering, and more...